Details:

Creators:
Olson, Michael J. ; Chin, Abby
Olson, Michael J. ; Chin, Abby Less -
Corporate Creators:
Oregon State University
Subject/TRT Terms:
[+]
Inclinometer Instruments For Measuring Roughness Pavements Paving Quality Assurance Surface Roughness--Measurement
Publication/ Report Number:
FHWA-OR-RD-13-03
Resource Type:
Tech Report
Geographical Coverage:
Oregon
Corporate Publisher:
Oregon. Dept. of Transportation ; United States. Federal Highway Administration
Oregon. Dept. of Transportation ; United States. Federal Highway Administration Less -
Abstract:
Oregon DOT is transitioning to use the International Roughness Index (IRI) for an incentive\disincentive program for

pavement smoothness evaluation for newly paved roads. The IRI will typically be determined by contractors using inertial

profilers. This research evaluated the procedures, site, and equipment used for establishing a reference profile for a

certification process for inertial profilers. In a comparison of several profiling devices, the inclinometer-based profiler used

by Oregon DOT for the reference profile showed sufficient results in repeatability and accuracy in profile measurement and

calculation of IRI. However, the certification site shows significant variability in IRI across the site, which can lead to

lower accuracy scores when the exact path is not followed. Further, significant differences in IRI were observed during

repeat visits throughout the course of the study period.

This study also evaluated the use of a new technology, terrestrial laser scanning, for pavement analyses. At larger extents,

terrestrial laser scanning (TLS) was compared to several current techniques to measure road profiles including digital

levels, inclinometers, and inertial profilers. TLS is able to collect a large, dense set of data relatively quickly for the entire

roadway and surrounding areas; hence, the data can not only be used for evaluating the pavement roughness but also can be

used for other design parameters such as transverse and longitudinal slope. The results show that profiles derived from

TLS data determined accurate IRI values and cross-correlation with the reference profile. At a finer scale, micron

resolution 3D laser scanners can be utilized to determine the influence of predominant aggregate size on the texture of the

pavement.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:38ffbda322dc4b2494a05286fff47b2dc1dc23101a9e6c28aebc8e027dad797f
Download URL:
https://rosap.ntl.bts.gov/view/dot/25462/dot_25462_DS1.pdf
File Type:

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